package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.ShoppingCart;
import com.itheima.reggie.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;

@RestController
@RequestMapping("/shoppingCart")
@Slf4j
public class ShoppingCartController {

    @Autowired
    private ShoppingCartService shoppingCartService;

    @GetMapping("/list")
    public R<List<ShoppingCart>> list() {

        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, BaseContext.getCurrentId());
        queryWrapper.orderByAsc(ShoppingCart::getCreateTime);

        List<ShoppingCart> list = shoppingCartService.list(queryWrapper);

        return R.success(list);

    }

    /**
     * 添加购物车
     * @param shoppingCart
     * @return
     */
    @PostMapping("/add")
    public R<ShoppingCart> add(@RequestBody ShoppingCart shoppingCart) {
        //设置用户id，指定当前是哪个用户的购物车数据
        long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);

        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId, userId);

        //判断加入购物车的是菜品还是套餐
        Long dishId = shoppingCart.getDishId();
        if (dishId == null) {
            queryWrapper.eq(ShoppingCart::getSetmealId, shoppingCart.getSetmealId());
        } else {
            queryWrapper.eq(ShoppingCart::getDishId, dishId);
        }

        //查询当前菜品或者套餐是否在购物车中
        ShoppingCart cartServiceOne = shoppingCartService.getOne(queryWrapper);

        if (cartServiceOne != null) {
            cartServiceOne.setNumber(cartServiceOne.getNumber() + 1);
            shoppingCartService.updateById(cartServiceOne);
        }else {
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartService.save(shoppingCart);
            cartServiceOne=shoppingCart;
        }

        return R.success(cartServiceOne);
    }

    /**
     * 清空购物车
     * @return
     */
    @DeleteMapping("/clean")
    public R<String> clean(){

        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,BaseContext.getCurrentId());

        shoppingCartService.remove(queryWrapper);

        return R.success("清空购物车成功");
    }

    /**
     * 减少购物车中菜品
     * @param shoppingCart
     * @return
     */
    @PostMapping("/sub")
    public R<ShoppingCart> sub(@RequestBody ShoppingCart shoppingCart){
        //设置用户id，指定当前是哪个用户的购物车数据
        long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);

        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,userId);

        //判断购物车的是菜品还是套餐
        Long dishId = shoppingCart.getDishId();
        if (dishId == null) {
            queryWrapper.eq(ShoppingCart::getSetmealId, shoppingCart.getSetmealId());
        } else {
            queryWrapper.eq(ShoppingCart::getDishId, dishId);
        }

        //查询当前菜品或者套餐是否在购物车中
        ShoppingCart cartServiceOne = shoppingCartService.getOne(queryWrapper);
        if (cartServiceOne!=null){
            Integer number = cartServiceOne.getNumber();
            if (number>1){
                cartServiceOne.setNumber(number-1);
                shoppingCartService.updateById(cartServiceOne);
            }else {
                shoppingCartService.removeById(cartServiceOne.getId());
            }
        }
        return R.success(cartServiceOne);
    }
}
